The SG6742HRSYD is a highly integrated power switch from Fairchild/ON Semiconductor designed for offline flyback converter applications. It incorporates a current mode PWM controller and a high-voltage power MOSFET, minimizing external components and simplifying power supply designs. This device offers a robust feature set for efficient and reliable operation in a variety of power adapter and charger applications.

Applications

• AC/DC Adapters for consumer electronics
• Battery Chargers for mobile devices
• Auxiliary Power Supplies
• Standby Power Supplies
• Open-frame SMPS

Features

• Integrated High-Voltage Power MOSFET: Simplifies design and reduces component count.
• Current-Mode PWM Control: Provides excellent line and load regulation.
• Low Startup Current: Minimizes power consumption during startup.
• Frequency Hopping: Improves EMI performance by spreading the switching frequency.
• Over-Temperature Protection (OTP): Protects the device from overheating.
• Over-Voltage Protection (OVP): Prevents damage from excessive output voltage.
• Over-Current Protection (OCP): Limits the output current to protect the device and load.
• Under-Voltage Lockout (UVLO): Ensures proper operation during startup and prevents erratic behavior.
• Open-Loop Protection (OLP): Protects the power supply from damage in case of feedback loop failure.
• Soft-Start Function: Reduces stress on components during startup.

Benefits

• High Efficiency: Optimized design for minimal power losses.
• Compact Design: Integration reduces board space requirements.
• Enhanced Reliability: Comprehensive protection features ensure robust operation.
• Simplified Design: Fewer external components required.
• Improved EMI Performance: Frequency hopping reduces electromagnetic interference.
• Cost-Effective Solution: Integration reduces overall system cost.

Additional Details

The SG6742HRSYD operates with a switching frequency that is internally optimized for efficiency and EMI performance. It comes in a DIP or SOP package. Detailed specifications regarding voltage ranges, current limits, and switching frequencies are available in the device datasheet. It’s designed to meet various international regulatory standards for power supplies.